package kr.re.etri.autoflow.controllers;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.media.Content;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.responses.ApiResponses;
import kr.re.etri.autoflow.service.PipelineUploadService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.Map;

@Slf4j
@RestController
@RequestMapping("/api")
@RequiredArgsConstructor
@CrossOrigin(origins = "*")
@io.swagger.v3.oas.annotations.tags.Tag(name = "Kubeflow Pipeline", description = "Kubeflow 파이프라인 API")
public class KubeflowExperimentsController {
    private final PipelineUploadService pipelineUploadService;

    @Operation(
            summary = "실험 목록 조회",
            description = "Kubeflow에 등록된 Experiment 리스트를 조회합니다."
    )
    @ApiResponses({
            @ApiResponse(responseCode = "200", description = "실험 목록 조회 성공"),
            @ApiResponse(responseCode = "500", description = "서버 내부 오류", content = @Content)
    })
    @GetMapping("/experiments")
    public ResponseEntity<Map<String, Object>> listExperiments(
            @Parameter(description = "조회할 namespace (생략 시 기본값)")
            @RequestParam(value = "namespace", required = false) String namespace,
            @Parameter(description = "페이지 크기 (기본값: 10)")
            @RequestParam(value = "pageSize", required = false, defaultValue = "10") int pageSize,
            @Parameter(description = "다음 페이지 토큰")
            @RequestParam(value = "pageToken", required = false) String pageToken
    ) {
        try {
            Map<String, Object> result = pipelineUploadService.listExperiments(namespace, pageSize, pageToken);
            return ResponseEntity.ok(result);

        } catch (Exception e) {
            log.error("List experiments failed", e);
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
                    .body(Map.of(
                            "status", 500,
                            "error", "Internal Server Error",
                            "message", e.getMessage()
                    ));
        }
    }

    @Operation(
            summary = "실험 단건 조회",
            description = "experiment_id로 Kubeflow Experiment 상세 정보를 조회합니다."
    )
    @ApiResponses({
            @ApiResponse(responseCode = "200", description = "실험 조회 성공"),
            @ApiResponse(responseCode = "404", description = "실험을 찾을 수 없음"),
            @ApiResponse(responseCode = "500", description = "서버 내부 오류")
    })
    @GetMapping("/experiments/{experimentId}")
    public ResponseEntity<?> getExperimentById(
            @Parameter(description = "조회할 Experiment ID") @PathVariable String experimentId
    ) {
        try {
            Map<String, Object> result = pipelineUploadService.getExperimentById(experimentId);

            if (result == null || result.isEmpty()) {
                return ResponseEntity.status(HttpStatus.NOT_FOUND)
                        .body(Map.of(
                                "status", 404,
                                "error", "Not Found",
                                "message", "Experiment not found"
                        ));
            }

            return ResponseEntity.ok(result);

        } catch (IllegalArgumentException e) {
            log.warn("잘못된 요청: experimentId={}", experimentId, e);
            return ResponseEntity.status(HttpStatus.BAD_REQUEST)
                    .body(Map.of(
                            "status", 400,
                            "error", "Bad Request",
                            "message", "Invalid experiment ID format"
                    ));

        } catch (Exception e) {
            log.error("Experiment 조회 실패: experimentId={}", experimentId, e);
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
                    .body(Map.of(
                            "status", 500,
                            "error", "Internal Server Error",
                            "message", "An unexpected error occurred while retrieving experiment"
                    ));
        }
    }
}